Steve Bannon, Trump's former chief strategist

Updated 4:06 PM ET, Fri August 18, 2017

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Photos:Steve Bannon, Trump's former chief strategist

White House chief strategist Steve Bannon has been fired, multiple White House officials told CNN on Friday, August 18. Bannon was generally perceived to be the driving force behind President Donald Trump's "nationalist" ideology.

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Photos:Steve Bannon, Trump's former chief strategist

Bannon was the executive chairman of Breitbart News before Trump hired him to run his campaign in August 2016.

Darryl Glenn, a Republican candidate for the US Senate, shakes hands with Bannon after appearing on Breitbart News Daily in July 2016.

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Photos:Steve Bannon, Trump's former chief strategist

Bannon reacts to a caller while hosting Breitbart News Daily in July 2016.

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Photos:Steve Bannon, Trump's former chief strategist

Bannon stands next to Jared Kushner, Trump's son-in-law, at a Trump rally in Canton, Ohio, in September 2016. Bannon frequently butted heads with other White House advisers, feuding with Kushner, chief economic adviser Gary Cohn and other more moderate members of the administration.

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Photos:Steve Bannon, Trump's former chief strategist

Park ranger Caitlin Kostic gives Trump and Bannon a tour of the national park in Gettysburg, Pennsylvania, in October 2016.

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Photos:Steve Bannon, Trump's former chief strategist

Bannon attends a Trump rally in Eau Claire, Wisconsin, in November 2016.